Queen perhaps delaying introduction of legislation (3)

I believe the answer is:

cat

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'queen perhaps' is the definition.
(a female cat is a queen)

I don't understand the remainder of the clue.

(Other definitions for cat that I've seen before include "Feline mammal" , "Animal (domesticated or wild)" , "Pussy" , "Tabby" , "Tiger, for instance" .)

I've seen this clue in The Independent.

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